Astudy (8.33%)18 also foundthat cystatin C levels in patients with CAD were higher than in the controlgroup and another study (8.33%)22 observed that cystatin C levels in patients with AMI werehigher than in patients with unstable angina, stable angina, and control group,and that cystatin C levels in patients with unstable angina were higher than inthose with stable angina and control group. Here, CST3 is linked to angina unstable.